XVI PREFACE. 



The Historical Society of Science is indebted to 

 J. H. C. Wright, Esq., of St. John's College, Cam- 

 bridge, for the transcripts of several of the letters 

 contained in this volume, which were most kindly 

 presented to the Society by that gentleman, whose 

 zeal and knowledge of science and its history are de- 

 serving of the highest praise. 



J. O. HALLIWELL. 



35, Alfred Place, Jan. 15, 1841. 



